ABSTRACT Various thermal protective ablative materials (TPAM) have been extensively studied. However, there are few reports on the thermal stability, the ablation properties and ceramisation of vitreous silica fabric reinforced boron phenolic resin composites with an incorporation of MoSi2 (VMBPR) and their bending strength after ablation. At this work, the above performances of the composites were characterised and analysed. Results reveal that the addition of MoSi2 decreases the graphitisation temperature of glass carbon of BPR pyrolysis, promoting the formation of a more ordered structure of the glassy carbon during pyrolysis. Furthermore, compared with the composites without MoSi2 (VBPR), the linear and the mass ablation rate of VMBPR composites decrease by about 94.46% and 39.09%, and its room temperature bending strength after static ablation at 1400°C for 20 min is more than twice that of the fused fibre aggregation formed by VBPR composites. This is attributed to the ceramisation reaction of VMBPR composites at high temperature.

中文翻译：

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通过掺入MoSi2提高陶瓷化玻璃纤维织物增强硼酚醛树脂复合材料的烧蚀性能

摘要 各种热保护烧蚀材料 (TPAM) 已被广泛研究。然而，关于掺入 MoSi2 (VMBPR) 的石英玻璃织物增强硼酚醛树脂复合材料的热稳定性、烧蚀性能和陶瓷化及其烧蚀后的弯曲强度的报道很少。在这项工作中，对复合材料的上述性能进行了表征和分析。结果表明，MoSi2的加入降低了BPR热解玻璃碳的石墨化温度，促进了玻璃碳在热解过程中更有序结构的形成。此外，与不含 MoSi2 (VBPR) 的复合材料相比，VMBPR 复合材料的线性和质量烧蚀率分别降低了约 94.46% 和 39.09%，1400°C静态烧蚀20分钟后的室温弯曲强度是VBPR复合材料形成的熔融纤维聚集体的两倍以上。这归因于 VMBPR 复合材料在高温下的陶瓷化反应。